I'm absolutely astounded.
Seriously, I am.
MW2...realistic? What?!
No, just, no. Based off real vehicles? Based off real weapons? That's funny, I wasn't aware every assault rifle in that game lacked a semi auto feature and could only be fired on fully automatic. Maybe I should take my C7 to an armourer to get it looked at, as it appears to only fire one round when I pull the trigger. Infantry carry laptops that let them randomly take control of predators whenever we feel like it? Must have missed that in my kit issue. I guess this also means that at twenty feet someone can shoot me with a burst of 5.56, and I can simply kill them with a knife, from 20 feet away. Any of the Afghan vets here get to call in a nuke if you shot 25 taliban?
'Based on real life' does not mean 'realistic', not in the slightest. That's like saying resident evil is realistic because the weapons are mostly based off of real weapons. MW2 is not realistic, period. It is however a fun, enjoyable game. That is it.
Tell you what, if you're convinced it's realistic, ask your instructors when you get to BMQ when you get to do the AC-130 training for when you get your killstreak.